这个题在于按什么规则排序
刚开始想的是比较两个字符串长度,如果长度不同,短的补自己第一个字符,补到相同时比较大小。。这样做测试点有一个没过。排序规则不对。比如321和3213,按这个规则谁在前不影响,然而321排前面才对。加另一个字符串
排在前面还是后面加起来比较大小就行了。以前做过类似的没注意。慢慢刷吧
#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
string sqe[10010];
bool cmp(const string& a,const string& b){
return a+b<b+a;
}
int main(){
int n,t,po=-1,pos=-1;
cin>>n;
for(int i=0;i<n;++i) cin>>sqe[i];
sort(sqe,sqe+n,cmp);
for(int i=0;i<n;++i){
int len=sqe[i].size();
for(int j=0;j<len;++j)
if(sqe[i][j]!='0'){
po=i;
pos=j;
break;
}
if(po!=-1) break;
}
if(po!=-1){
cout<<sqe[po].substr(pos,sqe[po].size()-pos);
for(int i=po+1;i<n;++i) cout<<sqe[i];
}
else cout<<'0';
cout<<endl;
return 0;
}Given a collection of number segments, you are supposed to recover the smallest number from them. For example, given {32, 321, 3214, 0229, 87}, we can recover many numbers such like 32-321-3214-0229-87 or 0229-32-87-321-3214 with respect to different orders of combinations of these segments, and the smallest number is 0229-321-3214-32-87.
Input Specification:
Each input file contains one test case. Each case gives a positive integer N (<=10000) followed by N number segments. Each segment contains a non-negative integer of no more than 8 digits. All the numbers in a line are separated by a space.
Output Specification:
For each test case, print the smallest number in one line. Do not output leading zeros.
Sample Input:5 32 321 3214 0229 87Sample Output:
22932132143287
本文介绍了一种通过排序算法构造最小可能数字的方法。该方法通过比较字符串的组合来确定正确的顺序,确保由数字段组成的最终数字尽可能小。文章还提供了一个C++实现示例。
2050

被折叠的 条评论
为什么被折叠?



